Abstract:
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
Abstract:
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
Abstract:
An apparatus and method for generation of a noise signal are provided. The apparatus includes a noise synthesizing module and a noise signal transfer module. The noise synthesizing module includes a voltage controlled oscillator, a phase frequency detector, a phase locked loop filter, and a reference generator which form a phase locked loop. An output signal of the reference generator is provided to a first phase-frequency input of the phase-frequency detector, and an output signal of the voltage controlled oscillator is provided to a second input of the phase-frequency detector. An output signal of the phase-frequency detector is provided to an input of the phase locked loop filter, and an output of the phase locked loop filter is provided to a frequency control input of the voltage controlled oscillator. The noise signal transfer module includes a sinusoidal generator and a frequency mixer having a first input which is provided with an output signal of the phase frequency detector and a second input which is provided with an output signal of the sinusoidal.
Abstract:
The invention provides a mixer comprising a multiplier circuit having a first and a second mixer, a generator for generating two first and two second control signals for controlling the first and second mixers, wherein the first and second control signals are in each case balanced signals and the first control signals have a frequency f1 and the second control signals have a different frequency f2.
Abstract:
Methods and systems for processing a signal with a corresponding noise profile are disclosed. Aspects of the method may comprise analyzing spectral content of the noise profile. At least one noise harmonic within the signal may be filtered based on said analyzed spectral content. The filtered signal may be limited. The noise profile may comprise a phase noise profile. The signal may comprise at least one of a sinusoidal signal and a noise signal. At least one filter coefficient that is used to filter said at least one noise harmonic may be determined. The filtering may comprise low pass filtering and the limiting may comprise hard-limiting the filtered signal. The signal may be modulated prior to the filtering. The signal may be downconverted prior to the modulating. At least one signal component of the signal may be downconverted.
Abstract:
Techniques are described that facilitate the generation of different waveforms at different frequencies required for transmission and reception of wireless voice signals and wireless data signals. For example, a technique may include generating a first waveform in a wireless communication device using a frequency synthesizer, wherein the first waveform has a frequency associated with a voice communication standard, and generating a second waveform in the wireless communication device using the same frequency synthesizer, wherein the second waveform has a frequency associated with a wireless networking standard. In this manner, a wireless communication device can be improved and possibly simplified.
Abstract:
A high frequency oscillator for combining outputs of two oscillator to generate an oscillation output. The oscillators has a substrate, a slot line formed on a first main plane of the substrate and having both longitudinal ends, the both longitudinal ends being electrically short-circuited, a first and a second amplifier for oscillation, each disposed on one and the other side of the slot line, and having outputs of the same oscillation frequency, and an unbalanced transmission line for connecting input terminals of the first and second amplifiers to each other and for connecting output terminals of the first and second amplifiers to each other. The unbalanced transmission line traverses the slot line and forms a closed loop including the first and second amplifiers.
Abstract:
An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.
Abstract:
A direct digital-to-analog microwave frequency signal synthesizer device which employs both wideband and narrowband direct digital frequency synthesizer (DDFS) circuitry to improve frequency and phase agility, reduce spurious performance, and minimize direct analog circuitry. A clock output having an extremely precise and highly stabilized frequency is fed to the wideband DDFS circuit and to the narrowband DDFS circuit. One or the other is selectively enabled by control logic circuitry. When the former is enabled, precision, high frequency resolution, low spurious, fast frequency switching is achieved at the microwave output. When the latter is enabled, precision, high frequency and phase resolution, low spurious, is achieved, providing frequency chirp, and frequency phase control at the microwave output. The output of the wideband DDFS circuit is processed to reduce the spurious response and up-converted, while the output of the narrow band DDFS circuit is directly up-converted. The selected DDFS circuit, is frequency up-converted to provide a synthesized microwave output signal.
Abstract:
The system includes a transmitter in which is provided a tone generator having a first oscillator to generate a first signal of a fixed frequency and a second oscillator which is variable to generate a second signal of a selected frequency. A multiplier receives the signals and provides a pair of tones having frequencies respectively equal to the sum of and difference between their frequencies. A switch may be provided so that both inputs to the multiplier are received from the variable frequency oscillator, in which case the output of the multiplier will be a single tone having a frequency twice that of the signal produced by the variable frequency oscillator. In either event, the tones are modulated on an RF wave. The system further comprises a receiver which has processing apparatus to receive incoming single side-band signals and convert them into IF components. A product detector in conjunction with an IF carrier source is operated to detect the IF signal and provide an intelligence message contained therein. A loudspeaker converts the intelligence message into audio information. An AM detector mixes the single side-band components to provide a signal having a frequency equal to the difference in frequencies between the tones in the incoming single side-band signals. A tuned circuit is responsive to a difference frequency signal of a predetermined frequency to provide an output signal to operate an electronic switch. In the presence of the output signal, the electronic switch produces an enabling signal to render the audio circuit operative and also to render the product detector operative and to render the AM detector inoperative. In the absence of the enabling signal, the audio circuit is inoperative as is the product detector but the AM detector is operative.